Sorry I ignored your questions in my first response. I got my first phrag in 1993 and my second in 1997, both still going strong. I lean toward the long-petalled ones (hence the Mont Fallu acquisition) but I also enjoy my Andean Fire and now have a "baby" Cleola which I'm hoping will be somewhere between pink and white in bloom.
My phrags are in a North East corner window so, at this time of year, they get a bit of direct sun early in the morning but the rest of the time the light is bright but indirect. I would say brighter than for Phals.
I water once weekly from the top and leave some of the water in the saucer below - not a lot! By mid-week the saucer is usually dry and the top of the coco fiber is starting to dry so I'll add another 1/8 inch or so to the saucer. They're not sopping wet!
As for fertilizing, I do this every second week in summer and every third in winter, rotating three kinds -- a 20-20-20, a high nitrogen, and a bloom booster. If a regular fertilizer (not particularly for orchids) I do it at half strength. If the fertilizer doesn't contain magnesium, I add magnesium sulphate (epsom salts) to it.
I hope this is helpful, Susie but remember it's just what works for me! Best of luck!